CVE-2026-55667 Details
Description
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.16, a scoped, non-admin File Browser user holding only the Create permission can delete arbitrary files outside their scope (other tenants' data, and the application's own database) via the upload failure-cleanup path. ScopedFs.RemoveAll is the one dereferencing operation that skips the symlink guard every other method enforces. The direct-upload handler runs RemoveAll on the user-controlled path during failed-upload cleanup, gated only by Perm.Create. If an escaping directory symlink already exists inside the user's scope, an authenticated create-only user can delete an out-of-scope target, bypassing both the ScopedFs boundary and the Perm.Delete gate. This vulnerability is fixed in 2.63.16.
A vulnerability exists in File Browser versions through 2.63.15, allowing scoped, non-admin users with only Create permission to delete arbitrary files outside their designated scope. This is achieved through the upload failure-cleanup process, which inadvertently bypasses security measures. The issue arises because the ScopedFs.RemoveAll function, responsible for deleting files, ignores symlink protections that are enforced by other methods. When a directory symlink is placed within the user's scope, the Create-only user can exploit this flaw to delete out-of-scope files, including those belonging to other tenants or the application's database.
Users can update to File Browser version 2.63.16 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 25, 2026CISA-ADP
Assessed Jun 26, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/filebrowser/filebrowser/security/advisories/GHSA-fmm7-x4gx-8jhr | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/filebrowser/filebrowser/security/advisories/GHSA-fmm7-x4gx-8jhr | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | [email protected] |
| CWE-59 | Improper Link Resolution Before File Access ('Link Following') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| File Browser | <= 2.63.15 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 26, 2026 | CVE Modified | CISA-ADP |
| Jun 25, 2026 | New CVE Received | [email protected] |